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  1. Humans

    Letters from the May 1, 2004, issue of Science News

    Skins game I know some people who carefully shield their bodies from the sun with sunscreen and clothing, and their skin is extremely pale. But if tanning acts as a protector (“Sunny Solution: Lotion speeds DNA repair, protects mice from skin cancer,” SN: 3/6/04, p. 147: Sunny Solution: Lotion speeds DNA repair, protects mice from […]

    By Science News
  2. Math

    Progressive Primes

    Prime numbers have all sorts of remarkable and mysterious properties. Evenly divisible only by themselves and 1, primes can’t be written as the product of smaller positive integers. There are infinitely many of them, and they appear to be scattered somewhat haphazardly among the whole numbers.